Kind'a like the real temperature data that threw the AGW pseudo-scientists for a loss and made 'em start fudging the numbers, right?
Worse, because the number fudging can be easily refuted. This is locked in stone and all other facts theories are either by kooks aliens conspiracy theorist and so on - total condemnation and so discredited. This is the fundamental basis for western science and history; if there were any cracks the entire edifice will be shown for an 19th Century fraud and all of Western civilization rests on that foundation.
Before the Islamic invasions of the 6th and 7th century destroyed most of western civilization and classical Christianity turning North Africa from a gain basket to a semi-arid desert, there were many things in common use then that we do not credit the ancients. Most of this knowledge was destroyed and is only coming to light from scraps and bits that got overlooked or were still buried.
It wasn’t until the early 19th Century that the art of shipbuilding regained abilities that were in common use in Greek and Roman times; until then, no ship was built to match the size of the 360’ Syracusia built in 240 BC.
Lenses for optics and telescopes were not rediscovered until Galileo in the 15th Century. And of course, no one to this day, can cut and match stones as massive as 100 tons to the tolerances the ancients did.
World history as we know it prior to the 10th Century (to pick a point) is mostly a fabrication of assumptions, guesswork, guesstimates, and just plain lies woven together in a semi-coherent story to keep people in line and the money flowing to the fabricators.